CN85205237U - Electric curtain - Google Patents

Abstract

The utility model discloses an electric curtain, which belongs to daily electric equipment. The electric curtain solves the defect of the utilization of power supply of conventional electric curtains. Besides, the electric curtain simplifies the circuits and reduces electrical components. The electric curtain adopts the starting switch of pulling type three pole double throw and the normal closing limit switch of a spring contact to control power supply on and off and the steering of a motor. The utility model has the advantages of high reliability, low cost, wide ranges of application, which is suitable for families and hotels.

Description

Electric curtain

The utility model belongs to daily-use electrical appliance.

Disclosed electrically driven curtain in the application number 85201297 that Patent Office of the People's Republic of China has accepted, the utility application file of the applying date 850415 adopts dragline type DPDT starting switch and the normally closed limit switch of reed contact, control on/off and motor steering.Because the symmetric double polarity dc source that this electrically driven curtain utilization obtains behind the electric main step-down rectifier has only one group of power work respectively when electrically driven curtain moves, thus exist the power utilization rate low, the defective of power transformer and filter circuit more complicated.Be unfavorable for further reducing production costs.At the deficiency of above-mentioned prior art, the utility model solves these problems technically.

The purpose of this utility model provides the electrically driven curtain that a kind of power utilization rate height, control circuit are simple, the small-sized DC low voltage motor drives.

Fig. 1 is the electrical schematic diagram of the electrical equipment and electrical control system of electrically driven curtain.(1) (2) limit switch wherein, (3) starting switch, (4) power supply transformation and rectifier, (5) motor.

Fig. 2 is the gear transmission mechanism of electrically driven curtain and the structural representation of electrical equipment and electrical control system.(1) (2) limit switch wherein, (3) starting switch, (4) power supply transformation and rectifier, (5) motor, (6) gear, (7) support, (8) shell, (9) driving wheel, (10) hauling rope, (11) limit switch contact block.

Fig. 3 is the starting switch (3) of electrically driven curtain, limit switch (1) (2) structural representation.

Fig. 4 is the structure side view of starting switch (3), limit switch (1) (2).

The utility model electrically driven curtain is made up of gear (6), transmission mechanism (9) (10), electrical equipment and electrical control system (1) (2) (3) (4) (5) (11), support (7) and shell (8). Its control principle and worker It is as follows to make process: electric main is imported motor (5) through the low-voltage DC that a winding point input power transformation and rectifier (4) conversion of limit switch (1) and starting switch (3) goes out through the in addition 2 winding points of starting switch (3), make electric machine rotation, power is passed to driving wheel (9) through gear (6), driving wheel drives index rope (10) motion, when moving to spacing position, limit switch contact block (11) the promotion limit switch (1) that is fixed on the hauling rope makes it normally closed some disconnection, cutting off the electric main supply current stops operating motor (5), finish the once motion of electrically driven curtain, it is then identical with the said process principle to stir starting switch (3), motor (5) counter-rotating, electrically driven curtain resets.

The main points of the utility model electrically driven curtain are that its electrical equipment and electrical control system is to have adopted the input break-make of three cuttves, two throw switches control electric main and the DC voltage polarity of electric current transformation and rectifier output, reaches turning to of control motor.Thereby improved the power utilization rate, simplified the making of control circuit and power transformer.Saved a filter condenser, the cost of whole electrically driven curtain is further reduced.The structure of three cuttves, two throw switches of this electrically driven curtain adopts the dragline type construction of switch simultaneously, has not only saved the switch pilot, has also kept the stay cord characteristic of conventional manual curtain.

In sum, the utlity model has power utilization rate height, the simple advantage of control circuit, have actual effect, and kept the stay cord characteristic of conventional manual curtain further reducing production costs.

Below, elaborate by means of Figure of description 1 and 2 pairs one instantiations of accompanying drawing.

Limit switch among the embodiment (1) (2) is the reed contact normally closed switch, starting switch (3) is that three cuttves two are thrown pull switch, and power supply transformation and rectifier (4) are made up of by 4 and one 1000 withstand voltage 16 volts electrolytic capacitor of microfarad of power transformer, 2CP type commutation diode of 5 watts 220 volts/8 volts power.Motor (5) model is 28Zy02, and gear is a double reduction, is made of rubber strip, plastic belt pulley and turning cylinder, and speed ratio is 30～40:1.Shell (8) is the plastic hot injection forming.Support (7) is a metallic stamping pieces.Hauling rope (10) is fixed with the limit switch contact block (11) that two duroplasts are made spherical shape above for multiply gummed nylon rope.

Claims (2)

1, electrically driven curtain is made up of gear (6), transmission mechanism (9) (10), electrical equipment and electrical control system (1) (2) (3) (4) (5) (11), support (7) and shell (8).It is characterized in that starting switch (3) is three cuttves, two throw switches.

2,, it is characterized in that starting switch (3) is dragline type three cuttves two throw switches according to the described electrically driven curtain of claim 1.

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